Because its already exists maybe.... You also make a big assumption that all of a sudden everyone will be smoking a fatty batty everyday for breakfast,lunch and dinner + a good old couple of straws of uncle Micks special powder before any social activity. So all the extra money can fund the current crisis along with the new users that all of sudden are going to be created. Sorry but people who are doing this stuff are already doing it.... SHOCK HORROR i know. So the state might as well make some money from it instead of some dodgy bloke and his mates in a council flat in NW London, Yes the current dealers will still undercut the state, its not going to go away. But their could well be less of them, and cleaner less strength stuff. Its a no brainier tbh anyone with a ounce of common sense can see it.